Self-measuring lubricant-delivery device



D. W. BARR.

SELF MESURINGALUBRICANT DELIVERY DEVICE. APPLICATION man MAY 29, 1919.

1,336, 187. Patented Apr. 6, 1920 Jnven for, avz'd T/VIBa rr, 252/ Zitorrzaz/.j

DAVID W. BARR, 0F DES MOINES, IOWA.

SELF-MEASURIN G LUBRICANT'DELIVERY DEVICE.

Specification of Letters Patent.

Patented Apr. 6, 1920.

Application filed May 29, 1919. Serial No. 300,614.

To all whom t may concern.'

Be it known that I, DAVID WV. BARR, a citizen of the United States of America, and a resident of Des Moines, Polk county, Iowa, have invented certain new and useful Improvements in Self-Measuring Lubricant- Delivery Devices, of which the following is a specification.

My invention relates to improvements in self-measuring lubricant delivery devices, and the Objects of my'improvements are, first, to supply means in constant communication with a supply of heavy hydrocarbon or other like substances capable of flow which may be actuated to deliver measured quantities of the substance .to bearings and other places, second, to

render said'v means adjustable to permit of varying the quantity delivered at will, and third, to appropriately design the mechanism vfor performing the above functions, and shape and relate the communicating container for the substance and the selfmeasuring delivery device so that the apparatus will function perfectly under all conditions of use.

These objects I have accomplished by the means which are hereinafter described and claimed, and which are illustrated in the accompanying drawings, in'V which Figure l is a-perspective view of my complete device, with a part ofthe delivery hose broken away; Fig. 2 is 'an enlarged medial longitudinal vertical section of the apparatus with parts thereof removed or broken away, and Fig. 3 is a detail perspective view of the valved piston.

Similar numerals of' reference denote corresponding parts throughout the several views.

My invention pertains particularly to that class of force-pumps or liquid delivery devices which are commonly called greaseguns, and as such, is efficient in the handling of relatively dense greases or hydrocarbons, or other liquids of a heavyJ inert and viscous character. l

Referring now to said Fig. 2, the numeral l denotes a cylindrical incl'osure or hopper which has an open top, the latter covered by a removable discoidal cover 28 provided with an opening for the occasional introduction of the heavy hydrocarbon or other substance to be delivered. The numeral 2' denotes a basal receptacle whose top has a circumferential flange extended outwardly.

An annular flanged ring 33 is fixedly brazed or otherwise secured upon the lower part of the hopper l and is removably mounted upon said flange of said receptacle by means of the bolts 34. The receptacle 2 is a relatively heavy casting preferably formed with integral parts as follows:

One end of said receptacle which, for convenience will be hereafter termed its forward end, has its wall sloped inwardly and downwardlyat a gentle slope at 32 to a point nearly central of the receptacle. The altitude of the inner end of the sloped part 32 is such as to afford room below it toward the bottom of the receptacle for the provision integrally in that end of the receptacle of a horizontal cylindrical part 3 whose inner end opens unobstructedly within the receptacle, with the sloped part 32 slightly overhanging it. The outer end of the' cylinder 3 is cast openV and outwardly flanged vor lugged with the flange oriced to receive bolts adapted to fasten thereon like registering flanges of a hollow conical head 5 terminating in a central hollow cylindrical nipple or nozzle 6. In the rear end of said receptacle 2, directly opposite the axis prolonged of the cylinder l is an orifice or opening closed by means of a stufling-box 9 within which is seated a reciprocatory piston-rod 8. Upon the forward end of said rod within said receptacle is fixedly mounted a solid discoidal piston l whose circumferential periphery is preferably rather wide and which is of a diameter to permit it to slidingly fit the interior of the cylinder 3, without the use of piston rings or packing. The piston is secured upon the threaded end of said rod by a nut 31, and the head 4, while a solid body, has a plurality of relatively large like circular openings 29 passing completely therethrough from its rear toits forward face. A nut 3l is also employed to secure on said rod a centrally orificed flexible body 30 having as many partially separated flaps with narrow necks as will completely cover the passages 29 in -said piston when said body is not under tension, as shown in said Fig. 3. These flaps thus serve as movable valves whose elasticity causes them to return after displacement from the piston while under stress.

The numeral 17 denotes a horizontal rack which is Xedly bracketed from the lower part or supporting feet of said receptacle to extend rearwardly thereof. Upon-the kare positioned astride said rack with their extremities below the rack cross-connectedby the fastening bolt 13. The angular parts of said forks are connected by a pintle 15, anda pinion 16 is rotatably mounted upon said pintle between the forks, and intermeshes with said rack 17.

The numeral 25 denotes a socket-member terminating downwardly with a pair of forks 18 whose lower extremities are transversely oriliced so that they may be mounted to rock upon said pintle 15. Nithin the socket of the. body 25 is mounted a lever 26 which may be a hollow cylindrical handle which, together with said body, may have registering orifices 27 to receive a securing rivet or bolt. On a pintle 19 above the pinion 16 and connecting the forks 18 is mounted a rocking double detent pawl whose oppositely directed detents 20 and 21 may be alternately manually engaged or disengaged with or from teeth of said pinion to act upon it oppositely as desired. A pairof lugs 22 are formed upon the medial upper edge of said pawl and on a pintle therebetween is pivoted the lower end of a short swinging varm 23 about which is coiled a small compression spring 24 with its upper end movably bearing against the liunctional connection of said forks. This forms a resiliently controlled toggle-joint or movable jointed member which, when the pawl is rocked sufliciently forward or back, causes the lastinentioned pintle to pass beyond its dead center whereby the pawl is resiliently held with either detent engaged 'with the pinion as desired.

The numeral 11 denotes a ring or collar lmounted slidably upon the rod 8 between the body 12 and the stuffing-box 9, and is adjustably secured to the rod by a setscrew 10.

It is to be understood, that instead of the so-called hopper 1, any other form of delivery vessel, such as an overturned barrel or other container, may be mounted upon the receptacle to deliver its contents thereinto. A receptacle and also the superposed hopper 1 may be completely filled with a heavy hydrocarbon or the like. In practice,

both detents 2O and 21 of the pawl may be disengaged .from the pinion y15 so that the pinion may rotate freely along the rack, giving greater scope of movement to the rod 8 when, because of the longitudinal shifting ofthe body 12, the piston 4 may be moved completely out of the cylinder '3 and rearwardly into the receptacle even vas far as the rear wall of the latter. The heavyhydrocarbon is impelled by gravity down- -wardly sand also along the overhanging slope 32 to fill in between the piston when in its rearward position and the inner open end of said c linder to also partially ll the cylinder. I/ en the lever 26 is rocked to thrust forward said piston, the latter forces an additional quantity of the interposed grease into the cylinder filling it. The cylinder 3 is formed to hold a determined quantity of the substance, such as one pound, or some other amount, to insure that one evacuation of the cylinder will deliver a knownv or measured amount at each complete evacuation. On its return stroke, the substance is pressed through the piston passages 29, impinging upon and pushing forward the flexible flaps or valves 30 so that the conical head 5 and also the cylinder in advance of the piston are filled, as a vacuum'isV formed in advance of the piston when moving backward which sucks down the heavy grease. The amount of substance evacuated at each stroke may be varied by adjusting the position of the ring 11 on the rod 8, as also changing the relative positions of the body 12 to the rack 17 .l A hose 7 may be detachably connectedto the nipple 6 tocarry the .e

discharged grease to a differential box or other place at a distance. As the diameter of the cylinder is relatively small, the interior capacity of the receptacle 2 and hopper 1 large, and the leverage of the lever 26 great, the operation of the device is made complete and eectual despite the weight and sluggishness of the substance acted upon, said operation being largely enhanced by the action of gravity. l

Grease will not escape from the delivery nozzle 6 when the piston is partially or completely withdrawn from the cylinder during repeated reciprocations, because of the vacuum formed in front of the piston when moving backward, it being understood that the viscosity of the grease is of a relatively high degree, allowing sucking back of the grease in the nozzlebefore grease is drawn in from above to lill the cylinder. When the operation is completed, the piston is left in the cylinder at its ,delivery end, while the nozzle of the hose 7 is stuck in the orifice of the cover 28, preventing Vescape of any grease therefrom.

Having described my invention, what I claim as new, and desire to, secure by Letters Patent, is:

1. In a device of the character described,

la receptacle including a horizontal cylinder extending within and along the bottom of the receptacle and opening thereinto, the cylinan open-top receptacle having an orificed bearing therein7 a horizontal cylinder eX- tending partially within and along the bottom of the receptacle and opening into the receptacle opposite and spaced from said bearing and having a delivery-port, a piston-rod extended from without the receptacle through said bearing and having a valved piston-head on its inner end adapted to be moved from a separated location in the receptacle into and out of the cylinder to push a quantity of the contents of the cylinder through said delivery-port, and mechanism without the receptacle operative upon said piston-rod to reciprocate it with a desired length of stroke.

SfIn a device of the character described, an open-top receptacle having in its lower part a sloping rentrant wall delivering to the inner open end of an open-ended horizontal cylinder, the outer open end of the cylinder projecting outwardly below said sloping rentrant wall7 and a valved piston movable from a position within the receptacle separated from the communication into the cylinder adapted to reciprocate to traverse the cylinder a determined distance to evacuate a determined quantity of the contents at each actuation.

4. In a device of the character described, a receptacle having at one side an inwardly sloping part with an underhung horizontal cylinder which opens into the receptacle to receive part of its contents delivered by said sloping part, said cylinder having in its outer head a delivery-port, and a valved piston in said receptacle mounted to reciprocate completely into and out of said cylinder.

Signed at Vaterloo, Iowa, this 19th day of May7 1919.

DAVID W. BARR. 

